Wednesday Sep 8th:

Key Concepts:  Vectors (displacement , velocity)

,

Journal:

Examples:

1.   If you travel 10m/s due east for 20 s, what is your:

a)   Speed

b)   Displacement

c)   Velocity

2.   If you travel 10m/s due east for 20 s, then you travel 20m/s for 20s due south, what is your:

a)   Speed

b)   Displacement

c)   Velocity

3.   If you travel 10m/s due east for 20 s, then you travel 20m/s for 20s due south, then you travel 10m/s due west for 20s, what is your:

a)   Speed

b)   Displacement

c)   Velocity

1.

a)   Speed (Dist/time) = 200m/20s = 10m/s

b)   Displacement  200m due east   (200∟ 0⁰ m)

c)   Velocity:

 (Disp/time  & Dir) = 200m/20s = 10m/s @ 0⁰

2.

a)   Speed (Dist/time) = 600m/40s = 15m/s

b)   Displacement   (447∟297 ⁰ m)

c)   Velocity:   447/40 =11.2 m/s @ 297⁰

3.

a)   Speed (Dist/time) = 800m/60s = 13.3m/s

b)   Displacement   (400∟270 ⁰ m)

c)   Velocity:   400/60 =6.67 m/s @ 270⁰

 H/W, Go over & Stamp

  L#2:  1-5, 7-10, 15-17   Due Today Wed 8 Sep

Thurs 9 Sep: Library

  L#3:  1-12, 14 - 17, 19   Due Friday 10 Sep

Quiz  Monday 13th   L# 1-3 

Tuesday 14th : Lab: Mass, Weight & Density

  L#4:  1-15, 18, 22   Due Wed 15 Sep (Mass, Wt, Speed, Vel)

 L#5:  1-15, 21   Due Friday 17 Sep

1. Vectors (Notes)

• a vector arrow (with arrowhead) is drawn in a specified direction. The vector arrow has a head and a tail.

• the magnitude and direction of the vector is clearly labeled. In this case, the diagram shows the Force of  316 m and the direction is (35 degrees starting West and going counter-clockwise)

  F_y

      F_x                                               

• Now we have to break down the vector to its "X" & "Y" components.

•  The Right Triangle (You must know this!!!!!!)

Example:

 A

                  __m?      __⁰?

                                           3m

                __⁰?

                          4m

 B

                 _m?         __⁰?

                                          5m

                  30^C?

               ___m?

a. 5,  (36.9⁰)  & (53.1⁰)

b. 10, 8.7 (60⁰)

__

  F_y

      F_x                                               

__________________________________________

F_y = (Sin q) (316)  = 181 N

__

  F_y

      F_x                                               

__________________________________________

F_y = (Sin q) (316)  = 181 N

3. c

4. a